Wes Groleau wrote:

> Sunny wrote:
>
>>
>>>> Possibly, but since I don't know what RAM an iMac uses I'm not sure
>>>> - but I have successfully used compatible PeeCee RAM in an Ultra 10.
>>>> You need 3.3V EDO DIMMs
>
>
> And later
>
>> Google says that's PC100 SDRAM, not EDO - in which case there _should_
>> be a discrepancy in notch location, but you say they are physically
>> identical. OTOH, there is no voltage discrepancy (both 3.3V), so it's
>> safe to try them once you have video and keyboard working.
>
>
> Are you sure?

Sure that the Ultra 10 uses 3.3V EDO RAM? Yes - "The memory architecture
uses the 168-pin JEDEC standard extended data out (EDO) 3.3-VDC buffered
DIMMs". Quote from the Ultra 5/10 Service Manual, section C.1.4:

http://www.sun.com/products-n-soluti...05-0423-11.pdf

> I thought EDO were the older smaller ones
> with the spring steel catches on each end, where you put
> the DIMM in at an angle and then straighten it to snap it
> into the catches.

Yes, EDO RAM is available in several form factors, including the 72-pin
layout you describe and the 168-pin format used in the Ultra 5/10.

> The Sun Ultra 10 has the larger ones where you put it in
> straight and pull a plastic latch on each end into a notch
> in the side of the DIMM.

I'm familiar with them.

> But in any case, I'm not changing any hardware or software
> before I see a prompt on a screen. Unless I have to do it
> to see that prompt!

Good plan :-)

Sunny